Water is not "soluble in water" because water is water.
A solution is two products mixed together, at least one of which is a liquid, to form a new product. Sugar syrup is a solution of sugar and water, for example. But if you add water to water, you're not mixing two products, you're just putting more water in the container.
Water soluble.
fat soluble vitamins are stored in our fat tissues and water soluble vitamins are soluble in water.
Water soluble.
Folate is water soluble.
Magnesium is water soluble.
soluble in water.
minerals are usually water soluble
Biotin is a water-soluble vitamin.
water- soluble
Diphenylamine is only slightly soluble in water, but more soluble in polar organic solvents.
water
the water is soluble because it is a liquid